<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>


<!-- 08di ba 个视频```````````````````````````````````````````````````````````` -->
    <!-- 卡片 -->
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
            </el-col>
        </el-row>
        <!-- biaoge表格区域 -->
        <tree-table class="treeTable" :data="catelist" :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index index-text="#" border 
        :show-row-hover="false">
        <template slot="isok" slot-scope="scope">
            <i class="el-icon-success" v-if="scope.row.cat_deleted === false" 
            style="color:lightgreen"></i>
            <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <template slot="order" slot-scope="scope">
            <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
            <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
            <el-tag type="success" size="mini" v-else>三级</el-tag>
        </template>
        <template slot="opt" slot-scope="scope">
         <!-- 修改 -->
         <el-button type="primary" icon="el-icon-edit" size='mini' >编辑</el-button>
         <!-- 删除 -->
         <el-button type="danger" icon="el-icon-delete" size='mini'>删除</el-button>
        </template>
        </tree-table>

        <!-- fneye分页区域 -->
        <el-pagination
         @size-change="handleSizeChange"
         @current-change="handleCurrentChange"
         :current-page="queryInfo.pagenum"
         :page-sizes="[3, 5, 10, 15]"
         :page-size="queryInfo.pagesize"
         layout="total, sizes, prev, pager, next, jumper"
         :total="total">
        </el-pagination>
    </el-card>

    <!-- 添加分类的对话框 -->
    <el-dialog
     title="添加分类"
     :visible.sync="addCateDialogVisible"
     width="50%"
     @close="addCateDialogClosed">
     <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类" prop="cat_pid">
            <!-- options用来指定数据源 -->
            <!-- props用来指定配置对象 -->
           <el-cascader
            expand-trigger="hover"
            :options="parentCateList"
            :props="cascaderProps"
            v-model="selectedKeys"
            @change="parentCateChange" clearable change-on-select>
           </el-cascader> 
        </el-form-item>
    </el-form>
     <span slot="footer" class="dialog-footer">
         <el-button @click="addCateDialogVisible = false">取 消</el-button>
         <el-button type="primary" @click="addCate">确 定</el-button>
     </span>
    </el-dialog>
  </div>
</template>

<script>


export default {
 data(){
     return{
        queryInfo:{
            type:3,
            pagenum:1,
            pagesize:5
         },
        catelist:[],
         total:0,
        columns:[
         {
         label:'分类名称',
         prop:'cat_name'
         },
         {label:'是否有效',
         type:'template',
         template:'isok'
         },
         {label:'排序',
         type:'template',
         template:'order'
         },
         {opt:'操作',
         //  表示,将当前列定义为模板列
         type:'template',
         //  opt为当前模板列的名称
         template:'opt'
         }
        ],
        //  添加分类的对话框是否显示
        addCateDialogVisible:false,
        addCateForm:{
            cat_name:'',
            cat_pid:0,
            cat_level:0
        },
        addCateFormRules:{
            cat_name:[
                {required:true , message:'请输入分类名称',trigger:'blur'}
            ]
        },
        // 父级分类列表数据
        parentCateList:[],
        cascaderProps:{
            value:'cat_id',
            label:'cat_name',
            children:'children',
            // expandTrigger:'hover'
        },
        selectedKeys:[],
     }
 },

 created(){
     this.getCateList()
 },

 methods:{
  async getCateList(){
     const {data:res} = await this.$http.get('categories',{params:this.queryInfo})
     if(res.meta.status !== 200){
        return this.$message.error('获取商品分类失败')
     }

     this.catelist = res.data.result
     this.total=res.data.total
  },
//   监听pagesize改变事件,每一页的数量
  handleSizeChange(newSize){
      this.queryInfo.pagesize = newSize
    //   刷新数据
      this.getCateList()
  },
//   监听pagenum的改变,页码值
  handleCurrentChange(newPage){
      this.queryInfo.pagenum = newPage
    //   刷新数据
      this.getCateList()
  },
  showAddCateDialog(){
      this.getParentCateList()
     this.addCateDialogVisible=true; 
  },
  async getParentCateList(){
      const {data:res} = await this.$http.get('categories',{params:{type:2}})
      if(res.meta.status !== 200) {
          return this.$message.error('获取父级分类数据失败')
      }
      this.parentCateList = res.data
  },
  parentCateChange(){
      console.log(this.selectedKeys)
      if(this.selectedKeys.length > 0){
          this.addCateForm.cat_pid = this.selectedKeys[
              this.selectedKeys.length - 1
          ]
          this.addCateForm.cat_level = this.selectedKeys.length 
          return 
      } else {
          this.addCateForm.cat_pid = 0
          this.addCateForm.cat_level = 0
      }
  },
  addCateDialogClosed(){
    //当关闭添加分类对话框时，重置表单
    this.$refs.addCateFormRef.resetFields()
    this.selectedKeys = [];
    this.addCateForm.cat_pid = 0
    this.addCateForm.cat_level = 0
  },
  addCate(){
      this.$refs.addCateFormRef.validate(async valid=>{
          if(!valid) return
          const {data:res} = await this.$http.post('categories',
          this.addCateForm)

          if(res.meta.status !== 201){
              return this.$message.error('添加分类失败')
          }
          this.$message.success('添加分类成功')
          this.getCateList()
          this.addCateDialogVisible = false
      })
      console.log(this.addCateForm)
  }
 }
  
}
</script>

<style lang="less" scoped>
 .treeTable{
     margin-top: 15px;
 }
 .el-cascader{
     width: 100%;
 }
</style>


